Dual action night latch and lock

ABSTRACT

A dual action night latch and lock assembly which is adapted to be secured to the interior surface of a door separate from a knob and latch bolt assembly and acting to latch or lock the door in closed position. The assembly is actuated by a handle on the interior of the door forming an extension of an actuator for a reciprocable bolt or by a key-actuated tumbler lock on the exterior surface of the door. The reciprocable bolt is springbiased to a normal latched position, and the handle and actuator are movable between three positions: the normal latch position, a bolt retracted position and a dead locked position. The actuator and handle includes a detent to retain the actuator in any one of its three positions.

[4 1 Oct. 16, 1973 DUAL ACTION NIGHT LATCH AND LOCK [75] Inventor: JohnL. Orr, Rockford, Ill.

[73] Assignee: Keystone Consolidated Industries, Inc., Peoria, 111.

22 Filed: May 10, 1971 21 Appl.No.:141,597

[52] US. Cl 292/169.l7, 70/150, 292/D1G. 62 [51] Int. Cl. E05c 1/12 [58]Field of Search 70/150, 152;

145, 191, DIG. 49, DIG. 62'

Primary Examiner-Marvin A. Champion Assistant Examiner-Lawrence J. StaabAtzorneyMolinare, Allegretti, Newitt & Witcoff [5 7] ABSTRACT A dualaction night latch and lock assembly which is adapted to be secured tothe interior surface of a door separate from a knob and latch boltassembly and acting to latch or lock the door in closed position. Theassembly is actuated by a handle on the interior of the door forming anextension of an actuator for a reciprocable bolt or by a key-actuatedtumbler lock on the exterior surface of the door. The reciprocable boltis spring-biased to a normal latched position, and the handle andactuator are movable between three positions: the normal latch position,a bolt retracted position and a dead locked position. The actuator andhandle includes a detent to retain the actuator in any one of its threepositions.

12 Claims, 25 Drawing Figures Patented Oct. 1 6, 1973 3,765,710

4 Shoots-Shoot 1 Patented Oct. 16, 1973 3,765,710

4 Sheets-Sheet 2 m fmwg DUAL ACTION NIGHT LATCH AND LOCK The presentinvention relates to a latch bolt assembly and more particularly to adual action night latch and lock assembly to be mounted on a door andactuated from the interior by an actuating handle or by a keyactuatedtumbler lock at the exterior of the door.

Among the objects of the present invention is the provision of a noveldual action night latch and lock assembly which will act either as aspring bolt lock or a dead bolt lock. The assembly is secured onto theinterior surface of a door with a strike secured to the door jamb. Theassembly includes a spring-biased reciprocable latch bolt projectingfrom one end of a lock housing to enter an opening in the strike. Thelatch bolt is controlled by an actuator rotatably mounted within thelock housing and having a handle integral therewith and extending fromthe end of the housing opposite the latch bolt.

Another object of the present invention is the provision of a dualaction night latch and lock assembly where the position of the actuatordetermines the function of the lock. The actuator is rotatable betweenthree positions to provide a normal latch position for the latch bolt,an unlatched position with the bolt being held in retracted position anda dead lock position.

A further object of the present invention is the provision of a dualaction night latch and lock assembly providing a positive directactuation of the latch bolt. The actuator acts directly on the latchbolt to either retract the bolt from its latched position or to advancethe latch bolt to a dead-locked position where the bolt is projectedfarther out of its housing and retained against retraction. The actuatorincludes a detent cooperating with detent notches in the housing toretain the actuator in any one of its threepositions.

The present invention also comprehends the provision of a dual actionnight latch and lock assembly which is actuated from the exterior of thedoor by a key-actuated tumbler lock. The tumbler lock includes arotatable plug rotating a tail piece extending through the door toengage an idler in the lock housing. The idler acts upon the actuatorwhich in turn directly actuates the latch bolt and the idler is providedwith a limited amount of lost motion in conjunction with the actuator.

Further objects are to provide a construction of maximum simplicity,efficiency, economy and ease of assembly and operation, and such furtherobjects, advantages and capabilities as will later more fully appear andare inherently possessed thereby.

In the drawings:

FIG. 1 is a partial perspective view of a door and jamb with the dualaction night latch and lock assembly and strike of the present inventionsecured thereto.

FIG. 2 is a front elevational view of the lock assembly and strike.

FIG. 3 is a bottom plan view of the lock assembly and strike with thedoor in cross section.

FIG. 4 is an end elevational view of the lock assembly with the door incross section and showing the actuating handle.

FIG. 5 is an enlarged horizontal cross sectional view of the lockassembly and strike taken on the line 55 of FIG. 2.

FIG. 6 is an enlarged rear elevational view of the lock assembly andstrike.

FIG. 7 is an enlarged vertical cross sectional view taken on the line7-7 of FIG. 3 and showing the lock components in the latched position.

FIG. 8 is a view similar to FIG. 7 but showing the components in thedead locked position.

FIG. 9 is a view similar to FIG. 7 but showing the components in theunlatched position.

FIG. 10 is a perspective view of the reciprocable latch bolt.

FIG. 11 is a rear elevational view of the latch bolt.

FIG. 12 is an end elevational view of the latch bolt taken from the lefthand side of FIG. 11.

FIG. 13 is a top plan view of the latch bolt.

FIG. 14 is a horizontal cross sectional view of the latch bolt taken onthe line 14-14 of FIG. 10.

FIG. 15 is a front elevational view of the idler.

FIG. 16 is a top plan view of the idler.

FIG. 17 is a rear elevational view of the idler.

FIG. 18 is a horizontal cross sectional view of the idler taken on theline 1818 of FIG. 15.

FIG. 19 is a front elevational view of the actuator.

FIG. 20 is a rear elevational view of the actuator.

FIG. 21 is a bottom plan view of the actuator.

FIG. 22 is a horizontal cross sectional view of the actuator taken onthe line 22-22 of FIG. 20.

FIG. 23 is a rear elevational view of the housing.

FIG. 24 is a horizontal cross sectional view of the housing taken online 2424 of FIG. 23.

FIG. 25 is a vertical cross sectional view of the housing taken on theline 2525 of FIG. 23.

Referring more particularly to the disclosure in the drawings wherein isshown an illustrative embodiment of the present invention, FIG. 1discloses a door or closure 10 hinged within a door jamb 11 to provideentry into a building or structure or to a room within the structure. Apair of conventional door knobs 12,12 actuate a latch bolt 13 projectingfrom the edge 14 of the door to cooperate with a strike plate 15 securedon the door jamb 1 l. Secured to the interior surface 16 of the dooradjacent the edge 14 and spaced above the knob 12 is a dual action nightlatch and lock assembly 17. adapted to cooperate with a strike 18mounted on the door jamb 11 in alignment with the assembly 17.

The strike 18 is formed as a generally rectangular hollow housing 19having one wall 21 extending beyond the housing to form a mountingflange 22 engaging the edge 23 of the door jamb 11. The flange 22 hasone or more openings adapted to receive screws 24, extending into theedge 23 of the jamb (FIG. 5) and one or more openings 26 are formed inthe top wall 25 of the strike to receive securing screws 27 (see FIGS.1, 2 and 6-9). The wall 21 is also provided with a large rectangularopening 28 adapted to receive the projecting end of a bolt as'will belater described.

The dual action night latch and lock assembly 17 includes a generallyrectangular housing 29 having a front wall 31 which can be decorated inany suitable manner to provide an ornamental appearance thereto. Thehousing includes an end wall 32 facing the strike 18 and having anopening 33 therein aligned with the opening 28 in the wall 21 of thestrike. An opposite end wall 34 has an elongated slot 35 therein, andedges 36,36 join the end walls 32 and 34.

The housing 29 is open toward the door 10 and a base plate 37 isconformably received within and secured to the housing 29 and hasoppositely extending tongues 38 and 39 received in the opening 33 andthe slot 35, respectively, to position and locate the base in thehousing and to limit the extent of the opening 33 and the slot 35. Thebase plate has openings 41 at the corners thereof aligned with openings42 in the housing 29 to receive suitable securing means, such as thescrews 43, to secure the assembly to the interior surface 16 of the dooror closure 10. The base plate 37 also has an opening 44 to receive anidler as will be later described, and the door 10 has a passage 45therethrough for a tailpiece 47 of a tumbler lock 46 suitably securedwithin the exterior surface of the door 10.

The housing 29 is provided with an annular projection 48 (FIG. providingan axis of rotation for the actuating mechanism, which axis is alignedwith the opening 44 in the base plate 37. In the end wall 34 are formedthree arcuately spaced detent recesses 49, 51, 52 (FIGS. 7 and 8). Alongitudinally extending guide recess 53 extends parallel adjacent oneedge 36, and a second longitudinal recess 54 is parallel to the oppositeedge 36.

The actuating mechanism includes a rotatable actuator 55 (FIGS. 7, 8,19-22) provided with a central generally circular portion 56 having anopening 57'receiving the annular projection 48 in the housing, andprovided on the side facing the base 37 with a generally circular recess58 (FIG.22) having an arcuate extension 59 on one side of an arc ofapproximately 60. Extending from the portion 56 and aligned with thearcuate extension 59 is an elongated handle 61 terminating in anenlarged end 62. On the side of the handle opposite the recess 58 is agenerally U-shaped recess 63 receiving a spring-biased detent 69 (FIG. 5Extending from the circular portion 56 at an obtuse angle from thehandle 61 is a camming arm 64 (FIGS. 19,20) terminating in an enlargedend 65 having a camming surface 66 and a retracting surface 67 joined bya curved outer surface 68.

The spring-biased detent 69 includes a detent ball 71 located at theopen end of the recess 63 and a compression spring 72 positioned withinthe recess. The ball 71 is of a size to be retractable within the recess63 but is normally urged into engagement within one of the three detentrecesses 49,51 or 52 formed in the housing 29. The handle 61 of theactuator 55 extends through the slot 35 in the end wall 34 where theenlarged end 62 can be manually grasped to actuate the lock assembly.

Received within the recess 58in the actuator 55 is an irregularly shapedidler 73 shown in FIGS. 6, 7, 8, 15 through 18. The idler 73 has acircular body 74 with a generally cruciform or cross-shaped passage 75therethrough to receive the rear end of the tailpiece 47 (FIG. 5). Thebody 74 is conformably received within the opening 44 so as to berotatable therein. An enlarged arcuate flange 76 is formed adjacent oneface 77 of the body 74 and extending over an arc of approximately 180.At a point intermediate the ends 78 of the flange 76 is provided aradially extending tongue 79; the flange 76 being received in the recess58 and the tongue 79 received in the arcuate extension 59. Thus, thereis a limited amount of lost motion between the idler 73 and the actuator55 through the tongue 79 and the arcuate extension 59.

A latch bolt 80 (FIGS. -14) is reciprocably mounted in the housing 29having a bolt body 81 with an outer end 82 provided with an inclinedcamming surface 83 which normally projects through the opening 33 in theend wall 32 and the opening 28 in the wall 21 into the strike 18 tocooperate therewith in latching or locking the door. The rear edge 84 ofthe bolt body 81 has an inclined camming surface 85 adapted to cooperatewith the actuator 55 in a manner to be later described. Laterallyextending from the body 81 opposite to the camming surface 85 is aspring arm 86 having a semi-circular recess 87 therein with an end wall88. This arm is aligned wth the elongated recess 54 within the arcuateportion of the end wall 88 received in the recess. A compression spring89 is positioned in the recess S4 and extends into the recess 87 to abutthe end wall 88 and bias the bolt to its latched position shown in FIG.7.

Laterally extending from the bolt body 81 opposite to the spring arm 86is an offset guide arm 91 terminating in an elongated guide 92 parallelto the bolt 80 and received within the guide recess 53 in the housing29. Extending inwardly toward the base plate 37 and located at the freeend of the guide 92 is a camming abutment 93 having angular intersectingcamming surfaces 94,94 facing the end wall 32 of the housing.

Assembling the latch structure, the compression spring 89 is positionedin the recess 54 and the latch bolt 80 seated in the housing 29 with thespring 89 entering the recess 87 and abutting the end wall 88, and theelongated guide 92 is located in the guide recess 53. The spring 72 anddetent ball 71 are positioned in the recess 63 in the actuator 55, andthe actuator is located on the projection 48 in the housing with thefront housing wall 31 acting to retain the spring 72 and ball 71 in therecess 63. Then the idler 73 is positioned on the actuator 55 with theflange 76 in the recess 58 and the tongue 79 in the arcuate extension59. Lastly, the base plate 37 is inserted into the open side of thehousing 29 with the tongue 38 positioned in the opening 33 and thetongue 39 in the slot 35. The assembled unit 17 is then secured to thedoor 10 by the screws 43 passing through the openings 41 and 42, and thestrike 18 is aligned and secured to the door jamb 11.

FIGS. 5 and 7 disclose the position of the actuator 55 with the bolt 80in its latched position. The recesses 49, 51 and 52 are spaced apart byequal angles of approximately 30, and the detent 69 is engaged in thecenter recess 51. In the latched position, the bolt 80 can be urgedinward into the housing 29 against the force of the spring 89 withoutany obstruction by the actuator 55, as when the door is moved to closedposition and the camming surface 83 engages the strike 18 to retract thebolt until the opening 28 is aligned with the opening 33 and the bolt.This position then is the normal latching position for the assembly 17.

To positively retract the bolt 80 to its unlatched position shown inFIG. 9, the handle 61,62 is rotated approximately 30 counterclockwise sothat the detent 69 engages the detent recess 49 and retains the actuator55 in that position. As the handle and actuator are rotated, the cammingarm 64 and end 65 are rotated downward so that the retracting surface 67engages the lower camming surface 94 on the abutment 93 of the elongatedguide 92 to urge the guide 92 and integral bolt 80 rearwardly with theguide 92 moving in the guide recess or track 53. The spring arm 86 alsomoves rearwardly to compress the spring 89. When retracted, the bolt 80will remain in the unlatched position as the spring 89 cannot overcomethe retaining force of the detent 69 engaging the recess 49. To returnthe bolt 80 to its latched position, the handle 61 and actuator 55 mustbe manually rotated clockwise until the detent 69 again engages therecess 51; the spring 89 acting on the arm 86 urging the bolt to itsprojected position.

The bolt 80 can also be projected an additional distance beyond thelatching position to a dead locked position as seen in FIG. 8. To moveto the dead locked position, the handle 61 and actuator 55 are rotatedapproximately 30 in a clockwise direction so that the detent 69 engagesthe recess 52. The cam arm 64 and end 65 move arcuately upward with thecamming surface 66 on the end 65 engaging the camming surface 85 on thebolt body 81 to cam the bolt 80 forwardly to an advanced position. Theend of the curved surface 68 moves partially behind the rear edge 84 ofthe bolt 80 to prevent the bolt from being retracted from the advanceddeadlocked position.

As an example, if the bolt end 82 is projected approximatelynine-sixteenths inch beyond the housing 29 in the latched position, thebolt in the dead locked position may be projected as much as 1 inchbeyond the housing. This also provides that the camming surface 83 ismoved entirely within the strike 18 where it cannot be engaged by a lockpicking tool to retract the bolt from the exterior side of the door 10.To retract the bolt 80 from the deadlocked position, the handle 61 andactuator 55 must be manually rotated counterclockwise until the detent69 again engages the recess 51 in the housing.

Operation of the latch bolt 80 to either the unlatched or the deadlockedposition may also be effected by key actuation of the tumbler lock 46 atthe exterior of the door. Rotation of the lock plug and the tailpiece 47will directly rotate the idler 73 in either direction. The idler 73 isshown in its neutral position in FIGS. 7, 8 and 9 with the tongue 79generally horizontally aligned with the detent recess 51. ConsideringFIG. 7, rotation of the idler 73 and its integral tongue 79 in acounterclockwise direction will cause the tongue to engage the upperedge of the arcuate recess extension 59 to rotate the actuator 55 in acounter-clockwise direction to the position of FIG. 9 to retract thebolt 80 to its unlatched position.

As the actuator 55 is only rotated approximately 30 and the arcuatelength of the recess 59 is approximately 60, the idler 73 can be rotatedin the opposite direction to return to its neutral position withoutaffecting the actuator the position of the actuator 55 and the neutralposition of the idler being shown in FIG. 9. R0- tation of the idler 73from its neutral position in a clockwise direction will cause the tongue79 to engage the lower edge of the recess 59 and rotate the actuator 55back to the position of FIG. 7, at which time the idler 73 can berotated in the opposite direction to its neutral position due to thelost motion arrangement between the tongue 79 and the arcuate recessextension 59 in the actuator.

From the position shown in FIG. 7, rotation of the idler 73 in theclockwise direction will rotate the actuator 55 to advance the bolt 80to its deadlocked position as seen in FIG. 8; the tongue 79 engaging thelower end of the arcuate extension 59. The lost motion arrangementallows return of the idler 73 to its neutral position as shown in FIG.8, and counterclockwise rotation of the idler from the position of FIG.8 will return the actuator 55 and the bolt 80 to the latching positionof FIG. 7. In all positions of the actuator 55, whether motivated by thehandle 61 or by the idler 73 through the tailpiece 47 and key-actuatedtumbler lock 46, the detent 69 and cooperating with any one of the threedetent recesses 49, 51 or 52 positively retains the actuator in theselected position.

Having thus disclosed my invention, I claim:

1. A dual action night latch and lock assembly for a door hingedlymounted in a frame therefor, comprising a housing secured to theinterior of the door and having an opening at one end and an elongatedslot at the opposite end, a strike secured to the door frame having anopening facing the opening in said housing, a bolt reciprocably mountedin the housing and resiliently biased to project through said opening inthe housing and enter the opening in said strike in a latched position,an actuator rotatably mounted in said housing and cooperating with saidbolt to either retract the bolt to an unlatched position or advance thebolt to a dead locked position, a handle integral with said actuator andextending through said slot in the housing for manual actuation thereof,three arcuately spaced recess means in said housing adjacent said slot',said handle including spring biased detent means facing said recessesfor engagement with any one of said recesses to selectively position andretain said actuator in any one of the three positions for said bolt.

2. A dual action night latch and lock assembly as set forth in claim 1,in which said bolt has a forward end with a camming surface thereon, anda rear edge, a laterally offset spring arm integral with said bolt, anda compression spring engaging said spring arm to bias said bolt tolatched position.

3. A dual action night latch and lock assembly as set forth in claim 1,in which said bolt has a generally laterally extending guide armterminating in an elongated guide extending parallel to said bolt, saidhousing having an elongated recess therein to receive said guide, and acam projection on said guide cooperating with said actuator forretraction of said bolt.

4. A dual action night latch and lock assembly as set forth in claim 3,in which said actuator has a camming arm thereon terminating in anenlarged end, a retracting surface on said end adapted to engage saidcam projection upon rotation of said actuator to retract said bolt tothe unlatched position.

5. A dual action night latch and lock assembly as set forth in claim 4,in which said enlarged end has a forward camming surface, and said bolthas a rearward camming surface thereon adapted to be engaged by saidactuator camming surface to advance said bolt to the deadlocked positionupon rotation of said actuator in the opposite direction.

6. A dual action night latch and lock assembly as set forth in claim 5,in which said bolt in the dead-locked position is retained againstretraction except upon rotation of said actuator, and in the latchedposition is allowed to be retracted into said housing without rotationof said actuator.

7. A dual action night latch and lock assembly as set forth in claim 1,in which said actuator has a circular recess with an arcuate extensiontherein, and an idler rotatably mounted in said housing and received insaid recess, a tongue on said idler received in said arcuate extensionto provide limited lost motion for said idler.

8. A dual action night latch and lock assembly as set forth in claim 7,in which said idler has a central passage therethrough, a key-activatedtumbler lock mounted in said door, and a tailpiece rotated by said lockand extending through said door and into said passage in the idler.

9. A dual action night latch and lock assembly as set forth in claim 8,in which actuation of said tumbler lock will rotate said idler and causerotation of said actuator to shift said bolt between the latched,unlatched and deadlocked positions.

10. A dual action night latch and lock assembly as set forth in claim 1,in which said strike includes a hollow housing receiving the end of saidbolt and secured to the interior surface of said frame, and a flange onsaid strike housing extending onto and secured on the edge of said framefacing the door.

11. A dual action night latch and lock assembly for a door hingedlymounted in a frame therefor, comprising a housing secured to theinterior of the door and having an opening at one end and an elongatedslot at the opposite end, a strike secured to the door frame having anopening facing the opening in said housing, a bolt reciprocably mountedin the housing and biased to project through said opening in the housingand enter the opening in said strike in a latched position, an actuatorrotatably mounted in said housing and cooperating with said bolt toeither retract the bolt to an unlatched position or advance the bolt toa dead locked position, said bolt having a generally laterally extendingguide arm terminating in an elongated guide extending parallel to saidbolt, said housing having an elongated recess therein to receive saidguide, said guide including a cam projection thereon for cooperationwith said actuator to retract said bolt, a handle integral with saidactuator and extending through said slot in the housing for manualactuation thereof, and means to selectively position and retain saidactuator in any one of three positions for said bolt.

12. A dual action night latch and lock assembly for a door hingedlymounted on a frame therefor comprising a housing secured to the interiorof the door and having an opening at one end, an elongated slot at theopposite end, a strike secured to the door frame having an openingfacing the opening in said housing, a bolt reciprocably mounted in thehousing and biased to project through said opening in the housing andenter the opening in said strike in a latched position, an actuatorrotatably mounted in said housing and cooperating with said bolt toeither retract the bolt to an unlatched position or advance the bolt toa dead locked position, said actuator including a circular recess withan arcuate extension therein, a handle attached to said actuator andextending through said slot in the housing for manual actuation thereof,means to selectively position and retain said actuator in any one of aplurality of positions for said bolt, and idler means rotatably mountedin said housing and received in said actuator recess, said idler meansincluding a tongue received in said arcuate extension to provide limitedlost motion for said idler means.

1. A dual action night latch and lock assembly for a door hingedlymounted in a frame therefor, comprising a housing secured to theinterior of the door and having an opening at one end and an elongatedslot at the opposite end, a strike secured to the door frame having anopening facing the opening in said housing, a bolt reciprocably mountedin the housing and resiliently biased to project through said opening inthe housing and enter the opening in said strike in a latched position,an actuator rotatably mounted in said housing and cooperating with saidbolt to either retract the bolt to an unlatched position or advance thebolt to a dead locked position, a handle integral with said actuator andextending through said slot in the housing for manual actuation thereof,three arcuately spaced recess means in said housing adjacent said slot,said handle including spring biased detent means facing said recessesfor engagement wIth any one of said recesses to selectively position andretain said actuator in any one of the three positions for said bolt. 2.A dual action night latch and lock assembly as set forth in claim 1, inwhich said bolt has a forward end with a camming surface thereon, and arear edge, a laterally offset spring arm integral with said bolt, and acompression spring engaging said spring arm to bias said bolt to latchedposition.
 3. A dual action night latch and lock assembly as set forth inclaim 1, in which said bolt has a generally laterally extending guidearm terminating in an elongated guide extending parallel to said bolt,said housing having an elongated recess therein to receive said guide,and a cam projection on said guide cooperating with said actuator forretraction of said bolt.
 4. A dual action night latch and lock assemblyas set forth in claim 3, in which said actuator has a camming armthereon terminating in an enlarged end, a retracting surface on said endadapted to engage said cam projection upon rotation of said actuator toretract said bolt to the unlatched position.
 5. A dual action nightlatch and lock assembly as set forth in claim 4, in which said enlargedend has a forward camming surface, and said bolt has a rearward cammingsurface thereon adapted to be engaged by said actuator camming surfaceto advance said bolt to the deadlocked position upon rotation of saidactuator in the opposite direction.
 6. A dual action night latch andlock assembly as set forth in claim 5, in which said bolt in thedead-locked position is retained against retraction except upon rotationof said actuator, and in the latched position is allowed to be retractedinto said housing without rotation of said actuator.
 7. A dual actionnight latch and lock assembly as set forth in claim 1, in which saidactuator has a circular recess with an arcuate extension therein, and anidler rotatably mounted in said housing and received in said recess, atongue on said idler received in said arcuate extension to providelimited lost motion for said idler.
 8. A dual action night latch andlock assembly as set forth in claim 7, in which said idler has a centralpassage therethrough, a key-activated tumbler lock mounted in said door,and a tailpiece rotated by said lock and extending through said door andinto said passage in the idler.
 9. A dual action night latch and lockassembly as set forth in claim 8, in which actuation of said tumblerlock will rotate said idler and cause rotation of said actuator to shiftsaid bolt between the latched, unlatched and deadlocked positions.
 10. Adual action night latch and lock assembly as set forth in claim 1, inwhich said strike includes a hollow housing receiving the end of saidbolt and secured to the interior surface of said frame, and a flange onsaid strike housing extending onto and secured on the edge of said framefacing the door.
 11. A dual action night latch and lock assembly for adoor hingedly mounted in a frame therefor, comprising a housing securedto the interior of the door and having an opening at one end and anelongated slot at the opposite end, a strike secured to the door framehaving an opening facing the opening in said housing, a boltreciprocably mounted in the housing and biased to project through saidopening in the housing and enter the opening in said strike in a latchedposition, an actuator rotatably mounted in said housing and cooperatingwith said bolt to either retract the bolt to an unlatched position oradvance the bolt to a dead locked position, said bolt having a generallylaterally extending guide arm terminating in an elongated guideextending parallel to said bolt, said housing having an elongated recesstherein to receive said guide, said guide including a cam projectionthereon for cooperation with said actuator to retract said bolt, ahandle integral with said actuator and extending through said slot inthe housing for manual actuation thereof, and means to selectivelyposition And retain said actuator in any one of three positions for saidbolt.
 12. A dual action night latch and lock assembly for a doorhingedly mounted on a frame therefor comprising a housing secured to theinterior of the door and having an opening at one end, an elongated slotat the opposite end, a strike secured to the door frame having anopening facing the opening in said housing, a bolt reciprocably mountedin the housing and biased to project through said opening in the housingand enter the opening in said strike in a latched position, an actuatorrotatably mounted in said housing and cooperating with said bolt toeither retract the bolt to an unlatched position or advance the bolt toa dead locked position, said actuator including a circular recess withan arcuate extension therein, a handle attached to said actuator andextending through said slot in the housing for manual actuation thereof,means to selectively position and retain said actuator in any one of aplurality of positions for said bolt, and idler means rotatably mountedin said housing and received in said actuator recess, said idler meansincluding a tongue received in said arcuate extension to provide limitedlost motion for said idler means.